Near 100 Squares

Square numbers near 100 (like 96 or 97) by anchoring on 100.

96² = 9216

96 sits 4 below 100, so 96² is (100 − 4)².

The distance comes off twice, which is why 96 − 4 = 92 starts the answer.

Then attach , padded to two digits because the anchor has two zeros.

Your turn

Three to try in your head — tap what you get.

90²

83²

95²

Keep practicing free in Math Challenge

All 36 shortcuts: the Magic Tricks library.